life-threatening

Thesaurus: synonyms, antonyms, and examples

able to harm you
dangerousIt's dangerous to walk alone in the woods at night.
unsafeDon't play in the street - it's unsafe.
hazardousHeavy rain is causing hazardous driving conditions.
perilousA perilous journey through the mountains was their only escape route.
treacherousIce had made the roads treacherous.
The pipe was found to be releasing dangerous chemicals into the sea.
She walked home by herself, although she knew that it was dangerous.她一个人步行回的家，尽管她知道那样做很危险。
Even a brief exposure to radiation is very dangerous.即便只是短暂受辐射也是非常危险的。
Dense fog has made driving conditions dangerous.
These men are armed and dangerous, and should not be approached.这伙人持有武器，非常危险，不要靠近他们。

SMART Vocabulary: related words and phrases

Dangers and threats
balefully
baneful
banefully
black spot
hang over something
hazard
hazardous
hazardously
hazmat
on/under pain of deathidiom
or elseidiom
parlous
parlously
peril
someone's bark is worse than his/her biteidiom
tombstoning
treacherously
triple threat
ultra-hazardous
venturesome

dangerous | American Dictionary

dangerous
adjective
us/ˈdeɪn·dʒər·əs, ˈdeɪndʒ·rəs/
able or likely to cause harm or death, or unpleasant problems:
dangerous chemicals/bacteria
Whooping cough is most dangerous for infants.

dangerously

adverbus/ˈdeɪn·dʒə·rə·sli/
dangerously high winds

Examples of dangerous

dangerous
The evidence suggests that unclear wording can be dangerous or at best make the treatment less effective.
Unless precautions are taken, humans could act as vectors for a range of dangerous pathogens and could disperse them widely.
But it is as dangerous as it is useful for two reasons.
An intending swimmer is prevented from entering the sea, because (it is reasonable to suppose) this person does not realize that the tides are dangerous.
At the same time, it was difficult, if not dangerous, to deny the developing sense of dominion identity.
Not only does his thought take us down dangerous paths, but these are directed by the specifics of a lifeworld.
These conditions are not only dangerous but also difficult for human beings.
A subgroup are detained under civil orders following non-criminalized but highly difficult or dangerous behaviour.
Following this interpretation, it may be dangerous to reject the variant reading 66° as a mere corruption.
There are numerous examples of treatments that were widely used yet it was later discovered that they were either ineffective or dangerous.
Only statements and conversations considered to be subversive or dangerous attracted the attention of those in authority and came to be recorded via judicial processes.
Crime statistics show that this is the most dangerous age.
Such assistance was considered a grave offense and was an extremely dangerous under taking.
The result is that many politicians feel it is dangerous to allow one ethnic group to produce the president for eight years.
One can be afraid of things that are not really dangerous, and long for things that are not good (for one).
These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors.